I have a Samsung model ln46a550p3fxza. The problem that I am having is the screen goes dark some of the time. It is random and only affects half of the screen. Changing channels does not do anything for it, but sometimes it will stay bright, other times it will darken just half of the screen or less.

SOURCE: Sharp Aquos LC-32D40U-picture goes off at random times

The bad news,your set needs a new inverter board installed.With persistence to sharp,you might be able to get them to pay for the parts.

SOURCE: Black Squares on the Screen

this kind of problem is normally do of bad cable box or sat

SOURCE: TV turns itself on, keeps changing it's own channel

the problem is with the control panel of your tv...make sure your remote doesnt have any part in this...just remove and the batteries and check if the channels still are changing.....see if the onboard switch for channel changing is stuck ?..if stuck u can use homemade tools to pull it back......if your tv is within your gurantee period...just giv a call to customer care....if not u can take it to a local repair shop...there is nothin that u can urself do to make it right ...sorry....for further info contact at

SOURCE: Samsung LE37A659A Black Screen and White stripe

Get in touch with the retailer straight away, and have them fix it under warranty.That is why they give yoyu a warranty, so taht if anything DOESgo wrong, they can fix it for you.

SOURCE: Samsung 204B random blank screen

I too have a dual monitor Samsung SyncMaster 204 setup. My monitors started flickering, then a week later had turn on problems like your describe. I found a fix on this fixya website and followed the fairly techie suggestion. It worked. I wrote up a .pdf set of instructions so others might also benefit. Hope this helps. Doug